On the X-Meridian's back plate, we find a number of gold-plated connectors, as you might expect from a sound card aimed at this kind of market. Starting from the right, you have microphone and line-in connectors, followed by analogue connectors for all of the speakers required in a full 7.1 multi-channel setup. Finally, you have two digital SPDIF Toslink connectors (for input and output respectively) - Connected to these are a pair of Toslink to mini-optical adapters, allowing you to use either type of optical cable depending on your particular setup. These two connectors have 25 Mbps of bandwidth, enough to support both Dolby and DTS' High Definition audio formats (Dolby TrueHD and DTS-HD respectively). Indeed, the configuration of the back plate is identical to the X-Meridian in every respect.